The current institutional shareholding score of Winchester Bancorp Inc is 3.00, ranking 252 out of 398 in the Banking Services industry. The latest institutional shareholding proportion is 6.67%, representing a quarter-over-quarter decrease of 33.02%. The largest institutional shareholder is James Simons, holding a total of 0.00 shares, representing 0.33% of shares outstanding, with 1.05% decrease in holdings.